Pulley, Double, Parallel, Plastic with Metal Housing, 70mm

GSC International 4218-00 Large Double Plastic Pulley These large pulleys are made of plastic, have a metal housing, and have hooks at the top and the bottom. Their size makes them easier to observe when teaching or experimenting with pulleys. All wheels are 7cm in diameter. This is a double pulley. Durable & Lightweight – Made from high-quality plastic, this pulley is sturdy yet easy to handle for classroom and lab use. Smooth Operation – Low-friction axle and wide wheel allow for effortless string movement and accurate demonstrations. Ideal for STEM Education – Perfect for teaching mechanical advantage, forces, and energy transfer in physics experiments. Versatile Mounting Options – Works with lab stands, ceiling hooks, or door frames for flexible setups. Great for All Levels – Suitable for middle school, high school, and introductory college-level physics demonstrations. ⚠️ Proposition 65 Warning for California Residents: WARNING: This product may expose you to chemicals including styrene and/or bisphenol A (BPA), which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.